Suppose hat 3 lbm of a gas are compressed from 14.7 psia and 70 F to 60 psia in a process such that pv^n = constant, where n = 1.4. if the initial volume of this gas is 45 ft^3 , find the final volume and temperature and find the work done. Assume that p, V, and T are interrelated by the equation of state pv = RT (R constant).